MULTISPAN MPD-152 - User Manual

The AMULTISPAN MPD-152 is a Motor Protection Device designed to safeguard motors from various electrical anomalies and operational stresses. This device offers comprehensive monitoring and protection features, ensuring the longevity and reliable operation of industrial motors.

Function Description

The MPD-152 monitors critical electrical parameters including voltage, current, and frequency across three-phase systems (3-wire or 4-wire configurations). It provides protection against a wide range of fault conditions:

Over/Under Voltage: Protects the motor from damage due to excessively high or low supply voltage.
Over/Under Current: Prevents motor damage from overloads or underloads, including conditions like dry running or mechanical obstruction.
Over/Under Frequency: Safeguards the motor from frequency deviations that can affect its speed and efficiency.
Unbalance: Detects voltage and current unbalance, which can lead to overheating and reduced motor life.
Phase Loss: Identifies and acts upon the loss of one or more phases, preventing single-phasing damage.
Lock Rotor Point (LRP): Protects the motor during start-up or when it stalls, preventing excessive current draw.
Single Phase Prevention (SPP): Specifically designed to prevent a three-phase motor from operating on a single phase.
Short Circuit: Offers protection against direct short circuits.
Phase Sequence: Monitors the phase sequence to ensure correct motor rotation.
Neutral Loss: Detects the loss of the neutral connection, available when SPP is enabled.

The device features user-selectable trip times, allowing customization of protection response. It also includes Auto/Manual/ZVR (Zero Value Reset) reset functions for convenience and operational flexibility. True RMS measurement ensures accurate readings even with distorted waveforms.

Important Technical Specifications

Trip Setting:

Under Current: 0.00 to CTR (Current Transformer Ratio)
Over Current: 0.00 to CTR
Under Voltage: 50 to 520V for 3Ø-3W; 30 to 300V for 3Ø-4W
Over Voltage: 50 to 550V for 3Ø-3W; 30 to 330V for 3Ø-4W
Over/Under Frequency: 45.0 to 65.0 Hz
Short Circuit: 1-9 Scale
Lock Rotor Point: 0.5 to 9.0 Scale
Unbalance: 5-60%

Time Parameter:

Power On Delay: 0 to 99 Sec
Initial Time Delay: 0 to 99 Sec
Trip Delay Time (Voltage, Current, Frequency, SSP, Unbalance): 0 to 999 Sec
Scrolling Time: 1 to 99 Sec
Reset Time: 0 to 99 Sec

Output Specification:

Relay: 1 C/O (NO-C-NC) type, rated 10Amp, 250V AC

Auxiliary Supply:

Supply Voltage: 100 to 270V AC, 50Hz
Power Consumption: 3VA @ 230 AC MAX

Environmental Condition:

Working Temperature: 0 to 55°C
Storage Temperature: 0 to 55°C
Relative Humidity: 95% RH Non-Condensing

Input:

Direct Voltage AC: 30 to 300V (L-N); 50 to 520V (L-L)
Burden (Voltage AC): < 0.2VA
Primary CT Ratio: 5 to 6000 Amp selectable
Secondary Current AC: 0.5 to 5 Amp
Burden (Current AC): < 0.2VA
Overload: Up to 6A continuous
Frequency: 45.0 to 65.0 Hz

Display and Keys:

Display: 3 Digit, 3 Line 7 Segment 0.28", RED LED
Keys: SET, INC, DEC, RST

Dimension:

Size (mm): 75(H) x 55(W) x 110(D)

Network Selection:

3 Phase - 4 Wire, 3 Phase - 3 Wire

Accuracy:

Class 1.0 (Standard)

Usage Features

The MPD-152 is designed for ease of use and configuration:

Key Operation: Dedicated keys for viewing individual parameters, entering parameter setting mode, viewing voltage/current pages during fault, and manually resetting the relay contact after tripping. Increment and decrement keys facilitate parameter adjustments.
Parameter Setting: Password-protected access to various setting groups (Power On Time & ITD Time, Under/Over Current/Voltage/Frequency, Single Phase Prevention, Short Circuit, Lock Rotor Point, Unbalance Current, Phase Sequence, Phase Loss, Network Selection & CT Ratio, Display Mode). This ensures secure and controlled configuration.
Reset Mode: Offers Manual, Auto, and ZVR (Zero Value Reset) options for fault clearing. In Manual mode, faults are reset by pressing the Reset key. In Auto mode, the relay resets after the healthy condition is achieved for the selected reset time. ZVR mode resets when the healthy condition is achieved or zero value is reached.
Initial Trigger: Allows selection of "I" (Current) or "V" (Voltage) trigger modes, determining when the relay starts working.
Relay Fault: Configurable to turn "off" or "on" when a fault is achieved, providing flexibility in fault indication.
Display Pages: Clear display of VLN (Voltage Line-Neutral), VLL (Voltage Line-Line), Ampere, and Frequency readings, along with fault messages, for easy monitoring.
DIN Rail Mounting: Designed for easy installation on a DIN rail, with a clamp mechanism for secure fitting and removal.

Maintenance Features

To ensure optimal performance and longevity, the MPD-152 requires simple maintenance:

Regular Cleaning: The equipment should be cleaned regularly to prevent blockage of ventilating parts.
Cleaning Agents: Use a clean soft cloth for cleaning. Avoid isopropyl alcohol or any other cleaning agent.
Fusible Resistor: The fusible resistor must not be replaced by the operator.

Safety Precautions

Always read the safety warnings in the instruction manual thoroughly before use.
Failure to follow safety rules can lead to fire, electrical shock, or other hazards.
Ensure the instrument operates on the correct power supply and voltage rating.
Improper handling may impair the device's protection.
Power supply to the equipment must be OFF during wiring to prevent electric shock.
Do not touch terminals while power is supplied.
Use wires with adequate rating and twists for electromagnetic interference reduction.
Cables for power source connection must have a cross-section of at least 1mm² and insulation capacity of at least 1.5kV.
Install a circuit breaker or mains switch between the power source and supply terminal in an easily accessible location.
Prevent metal pieces, wire clippings, or metallic fillings from entering the product during installation.
Use and store the instrument within the specified ambient temperature and humidity ranges.

MULTISPAN MPD-152 Specifications

General

Brand	MULTISPAN
Model	MPD-152
Category	Protection Device
Language	English

Related product manuals

MULTISPAN MPD-192

8 pages

MULTISPAN MPD-152 - User Manual

Table of Contents

Other manuals for MULTISPAN MPD-152

Summary

FEATURES

User Selectable Trip Time

Auto;Manual;ZVR Reset Function

True RMS Measurement

Protection Available

TECHNICAL SPECIFICATION

INPUT: Voltage AC

INPUT: Current AC

DISPLAY AND KEYS

DIMENSION

NETWORK SELECTION

ACCURACY

TRIP SETTING

Under Current

Over Current

Under Voltage

Over Voltage

Over; Under Frequency

Short Circuit

Lock Rotor Point

Unbalance

TIME PARAMETER

Power On Delay

Initial Time Delay

Trip Delay Time

Scrolling Time

Reset Time

OUTPUT SPECIFICATION

Relay Type

Rating

AUXILIARY SUPPLY

Supply Voltage

Power Consumption

ENVIRONMENTAL CONDITION

Working Temperature

Storage Temperature

Relative Humidity

TERMINAL CONNECTION

KEY OPERATION

Operator Mode

Parameter Setting Mode

SAFETY PRECAUTION

WARNING GUIDELINES

MECHANICAL INSTALLATION

Front View

Side View

MAINTENANCE

Cleaning

Component Replacement

INSTALLATION GUIDELINES

FAULT MESSAGE

Under Current fault Message

Phase Loss Message

Single Phase Prevention Fault

Frequency Fault Message

Unbalance Fault Message

Lock Rotor Point

Phase Sequence Message

Neutral Loss Message

DISPLAY PAGES

3Ø - 4 W NETWORK CONNECTION

3Ø - 3 W NETWORK CONNECTION

3Ø-3 W; 3- 4 W NETWORK CONNECTION

WIRING CONNECTION

3 Phase - 4 Wire

3 Phase - 3 Wire

PARAMETER SETTING

Password Entry

Time Parameter Settings

Voltage and Current Settings

Frequency Settings

Over Current Curve Selection

PARAMETER SETTING

Single Phase Prevention (SPP) Configuration

Short Circuit and Lock Rotor Point Settings

Unbalance and Phase Fault Settings